Pennsylvania Railroad & Louisiana Purchase Exposition. (1905). The Pennsylvania railroad system at the Louisiana Purchase Exposition: Locomotive tests and exhibits, Saint Louis, Missouri, 1904. Pennsylvania Railroad Co..
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Pennsylvania Railroad و Louisiana Purchase Exposition. The Pennsylvania Railroad System at the Louisiana Purchase Exposition: Locomotive Tests and Exhibits, Saint Louis, Missouri, 1904. Philadelphia: Pennsylvania Railroad Co., 1905.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Pennsylvania Railroad و Louisiana Purchase Exposition. The Pennsylvania Railroad System at the Louisiana Purchase Exposition: Locomotive Tests and Exhibits, Saint Louis, Missouri, 1904. Pennsylvania Railroad Co., 1905.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.